/*
 * Anything: A flexible and easy to use data structure that combines the 
 * characteristics of a list and a hashmap into one data structure.
 * 
 * Based on a paper by Peter Sommerlad and Marcel Rueedi on 
 * 'Do-it-yourself reflection' entered at EuroPLOP 1998.
 * 
 * This library was written completely from scratch and is based only 
 * in spirit on the original Java Anything implementation written by 
 * Andre Weinand/Marcel Rueedi in 1997/99 and enhanced by Stefan Tramm 
 * in 2006.
 * 
 * Copyright (c) 2008 Thomas Marti and others. All rights reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package any.util;

import java.io.PrintWriter;

import any.incubator.ObjectHandlingStrategy;
import any.incubator.UnknownObject;

public class BasePrinterVisitor {
	
	protected final PrintWriter out;
	protected int depth = 0;
	protected int indent;
	protected boolean linebreak;
	protected ObjectHandlingStrategy strategy = ObjectHandlingStrategy.AS_UNKNOWN_OBJECT;
	
	public BasePrinterVisitor(PrintWriter out) {
		this.out = out;
	}

	protected UnknownObject getObject(Object value) throws IllegalStateException, NullPointerException {
		return strategy.getUnknownObject(value);
	}
	
	//TODO: Do we need to flush after every print-operation
	protected void print(String string) {
		out.print(string);
		out.flush();
	}

	protected void println() {
		if (!linebreak) return;
		out.println();
		out.flush();
	}

	protected void indent() {
		if (!linebreak) return;
		final char[] buf = new char[depth*indent];
		for (int i = 0; i < buf.length; i++) {
			buf[i] = ' ';
		}
		out.print(buf);
		out.flush();
	}
	
}
